[2021] WotC Customer Support: We plan to do an automatic grant to @MTG_Arena players who had their draft and sealed events forcefully ended as a part of today's extended maintenance.

These grants are in progress currently. All players who had an event end early will receive gems equivalent to the sealed and/or draft entry fees (regardless of whether you entered with gold, gems, or tokens). You will also keep the cards from your original pool and whatever rewards you earned from the in-progress courses.